Rape
two species of Brassica.
Summer rape is B. campestris, and winter rape B. napus. Sir J. Hooker regards the latter as a sub-species of the former, and the turnip as another subspecies. B. campestris proper has the root tuberous, the radical leaves hispid.
It is the Swedish turnip. B. napus, the rape properly so called, has the root fusiform, and the leaves all glabrous and glaucous. It is cultivated as a salad plant, and is sometimes also used in lieu of greens. Sometimes it is called also cole seed.